diff options
| author | Christoph Hellwig <hch@lst.de> | 2017-04-27 09:42:25 +0200 |
|---|---|---|
| committer | Sasha Levin <alexander.levin@verizon.com> | 2017-07-31 13:37:52 -0400 |
| commit | 59724793983177d1b51c8cdd0134326977a1cabc (patch) | |
| tree | 4d162fe2d729d838dea2dcf8813c5dc168411a72 /fs | |
| parent | 666d1fc2023eee3bf723c764eeeabb21d71a11f2 (diff) | |
fs: completely ignore unknown open flags
[ Upstream commit 629e014bb8349fcf7c1e4df19a842652ece1c945 ]
Currently we just stash anything we got into file->f_flags, and the
report it in fcntl(F_GETFD). This patch just clears out all unknown
flags so that we don't pass them to the fs or report them.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Sasha Levin <alexander.levin@verizon.com>
Diffstat (limited to 'fs')
| -rw-r--r-- | fs/open.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/fs/open.c b/fs/open.c index ff80b2542989..d0169e52d7fe 100644 --- a/fs/open.c +++ b/fs/open.c @@ -881,6 +881,12 @@ static inline int build_open_flags(int flags, umode_t mode, struct open_flags *o int lookup_flags = 0; int acc_mode; + /* + * Clear out all open flags we don't know about so that we don't report + * them in fcntl(F_GETFD) or similar interfaces. + */ + flags &= VALID_OPEN_FLAGS; + if (flags & (O_CREAT | __O_TMPFILE)) op->mode = (mode & S_IALLUGO) | S_IFREG; else |